Are you able to replant trees?
you use shovels to dig holes and then you put seeds into a seed tray and then put those seedlings into the holes
you can also just make a hole and add a tree seed...
Yes, first you make a shovel and dig a hole. Then, build a seedling tray. Put acorns into it. Then you can take them out as saplings. Right click a hole while holding a sapling.